package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class CategoryServiceImpl implements CategoryService {


    @Autowired
    SetmealMapper setmealMapper;
    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;

    /**
     * 新增分类
     *
     * @param categoryDTO
     */
    @Override
    public void save(CategoryDTO categoryDTO) {
        Category category = new Category();
        // 拷贝属性
        BeanUtils.copyProperties(categoryDTO, category);
        // 状态填充
        // 新添加的分类状态默认为“禁用[0]”
        category.setStatus(StatusConstant.DISABLE);

        // 添加数据
        categoryMapper.insert(category);

    }

    /**
     * 分类分页查询
     *
     * @param categoryPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(CategoryPageQueryDTO categoryPageQueryDTO) {
        PageHelper.startPage(
                categoryPageQueryDTO.getPage(),
                categoryPageQueryDTO.getPageSize()
        );
        // 吓一跳sql进行分页，自动加入limit关键子分页
        Page<Category> page = categoryMapper.pageQuery(categoryPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 删除分类
     *
     * @param id
     */
    @Override
    public void deleteById(Long id) {
        //     查询当前分类是否关联了菜品
        Integer count = dishMapper.countByCategoryId(id);
        if (count > 0) {
            //     在菜品表中有关联
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }

        //     没关联菜品，接着删除
        //     查询是否关联了套餐
        count = setmealMapper.countByCategoryId(id);
        if (count > 0) {
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        //     没关联套餐，接着删除

        categoryMapper.deleteById(id);
    }

    /**
     * 修改分类
     *
     * @param categoryDTO
     */
    @Override
    public void update(CategoryDTO categoryDTO) {
        Category category = new Category();
        //     赋值数据
        BeanUtils.copyProperties(categoryDTO, category);
        //     更新数据
        categoryMapper.update(category);
    }

    /**
     * 启用禁用分类
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        // 补充数据
        Category category=Category
                .builder()
                .id(id)
                .status(status)
                .build();
        categoryMapper.update(category);
    }

    /**
     * 根据类型查询分类
     * @param type
     * @return
     */
    @Override
    public List<Category> list(Integer type) {
        return categoryMapper.list(type);
    }
}
